Synnefo » snf-image-creator

# Copyright 2012 GRNET S.A. All rights reserved.

#

# Redistribution and use in source and binary forms, with or

# without modification, are permitted provided that the following

# conditions are met:

#

#   1. Redistributions of source code must retain the above

#      copyright notice, this list of conditions and the following

#      disclaimer.

#

#   2. Redistributions in binary form must reproduce the above

#      copyright notice, this list of conditions and the following

#      disclaimer in the documentation and/or other materials

#      provided with the distribution.

#

# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

# POSSIBILITY OF SUCH DAMAGE.

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# The views and conclusions contained in the software and

# documentation are those of the authors and should not be

# interpreted as representing official policies, either expressed

# or implied, of GRNET S.A.

import sys

from progress.bar import Bar

from colors import red, green, yellow

def error(msg, new_line=True, color=True):

    nl = "\n" if new_line else ' '

    if color:

        sys.stderr.write(red('Error: %s' % msg) + nl)

    else:

        sys.stderr.write('Error: %s' % msg + nl)

def warn(msg, new_line=True, color=True):

    nl = "\n" if new_line else ' '

    if color:

        sys.stderr.write(yellow("Warning: %s" % msg) + nl)

    else:

        sys.stderr.write("Warning: %s" % msg + nl)

def success(msg, new_line=True, color=True):

    nl = "\n" if new_line else ' '

    if color:

        sys.stdout.write(green(msg) + nl)

    else:

        sys.stdout.write(msg + nl)

    if not nl:

        sys.stdout.flush()

def output(msg='', new_line=True):

    nl = "\n" if new_line else ' '

    sys.stdout.write(msg + nl)

    if not nl:

        sys.stdout.flush()

class Output(object):

    def error(self, msg, new_line=True):

        error(msg, new_line, False)

    def warn(self, msg, new_line=True):

        warn(msg, new_line, False)

    def success(self, msg, new_line=True):

        success(msg, new_line, False)

    def output(self, msg='', new_line=True):

        output(msg, new_line)

    def _get_progress(self):

        progress = self._Progress

        progress.output = self

        return progress

    Progress = property(_get_progress)

    class _Progress(object):

        def __init__(self, size, title, bar_type='default'):

            self.output.output("%s..." % title, False)

            self.size = size

        def goto(self, dest):

            pass

        def next(self):

            pass

        def success(self, result):

            self.output.success(result)

    def progress_generator(self, message):

        def generator(n):

            progressbar = self.Progress(message, 'default')

            progressbar.max = n

            for _ in range(n):

                yield

                progressbar.next()

            progressbar.success('done')

            yield

        return generator

class Output_wth_colors(Output):

    def error(self, msg, new_line=True):

        error(msg, new_line)

    def warn(self, msg, new_line=True):

        warn(msg, new_line)

    def success(self, msg, new_line=True):

        success(msg, new_line)

class Output_wth_progress(Output_wth_colors):

    class _Progress(Bar):

        MESSAGE_LENGTH = 30

        template = {

            'default': '%(index)d/%(max)d',

            'percent': '%(percent)d%%',

            'b': '%(index)d/%(max)d B',

            'kb': '%(index)d/%(max)d KB',

            'mb': '%(index)d/%(max)d MB'

        }

        def __init__(self, size, title, bar_type='default'):

            super(Output_wth_progress._Progress, self).__init__()

            self.title = title

            self.fill = '#'

            self.bar_prefix = ' ['

            self.bar_suffix = '] '

            self.message = ("%s:" % self.title).ljust(self.MESSAGE_LENGTH)

            self.suffix = self.template[bar_type]

            self.max = size

            # print empty progress bar workaround

            self.goto(1)

        def success(self, result):

            self.output.output("\r%s...\033[K" % self.title, False)

            self.output.success(result)

class Silent(Output):

    def warn(self, msg, new_line=True):

        pass

    def success(self, msg, new_line=True):

        pass

    def output(self, msg='', new_line=True):

        pass

class Silent_wth_colors(Silent):

    def error(self, msg, new_line=True):

        error(msg, new_line)

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